[fix] Fix runtime filter URL generation and revert relativePath in Tw…

[baldrys-ed]

…ig macros

• CacheManager::generateUrl(): unwrap processors from config to avoid double-nesting (processors[processors][fill] → processors[fill]), and sign hash with the same unwrapped data that the controller receives
• CacheManager::extractDensity(): look inside processors key for density
• RuntimeAction: wrap query processors back into ['processors' => ...] before passing to FilterService, so array_replace_recursive correctly merges runtime processors with filter config
• Twig macros: revert to src.uri|default(src) — relativePath is removed from file-bundle, and uri works correctly for filesystem storage